ref: a1a120547768ee33ddaae4ee1965dfcf85149d8a
dir: /sys/man/2/fauth/
.TH FAUTH 2 .SH NAME fauth \- set up authentication on a file descriptor to a file server .SH SYNOPSIS .nf .PP .ft L #include <u.h> #include <libc.h> .PP .ft P .B int fauth(int fd, char *aname) .SH DESCRIPTION .PP .I Fauth is used to establish authentication for the current user to access the resources available through the 9P connection represented by .IR fd . The return value is a file descriptor, conventionally called .BR afd , that is subsequently used to negotiate the authentication protocol for the server, typically using .IR auth_proxy or .IR fauth_proxy (see .IR auth (2)). After successful authentication, .B afd may be passed as the second argument to a subsequent .B mount call (see .IR bind (2)), with the same .IR aname, as a ticket-of-entry for the user. .PP If .I fauth returns -1, the error case, that means the file server does not require authentication for the connection, and .B afd should be set to -1 in the call to .BR mount. .PP It is rare to use .IR fauth directly; more commonly .I amount (see .IR auth (2)) is used. .SH SOURCE .B /sys/src/libc/9syscall .SH SEE ALSO .IR attach (5), .IR auth (2) (particularly .BR amount ), .IR authsrv (6), .IR auth (8) .SH DIAGNOSTICS Sets .IR errstr .